1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
/**********************************************************************
gc_hook.c - GC hook mechanism/ObjectSpace extender for MRI.
$Author$
created at: Tue May 28 01:34:25 2013
NOTE: This extension library is not expected to exist except C Ruby.
NOTE: This feature is an example usage of internal event tracing APIs.
All the files in this distribution are covered under the Ruby's
license (see the file COPYING).
**********************************************************************/
#include "ruby/ruby.h"
#include "ruby/debug.h"
static void
invoke_proc(void *data)
{
VALUE proc = (VALUE)data;
rb_proc_call(proc, rb_ary_new());
}
static void
gc_start_end_i(VALUE tpval, void *data)
{
rb_trace_arg_t *tparg = rb_tracearg_from_tracepoint(tpval);
if (0) fprintf(stderr, "trace: %s\n", rb_tracearg_event_flag(tparg) == RUBY_INTERNAL_EVENT_GC_START ? "gc_start" : "gc_end");
rb_postponed_job_register(0, invoke_proc, data);
}
static VALUE
set_gc_hook(VALUE rb_mObjSpace, VALUE proc, rb_event_flag_t event, const char *tp_str, const char *proc_str)
{
VALUE tpval;
ID tp_key = rb_intern(tp_str);
ID proc_key = rb_intern(proc_str);
if (RTEST(tpval = rb_ivar_get(rb_mObjSpace, tp_key))) {
rb_tracepoint_disable(tpval);
rb_ivar_set(rb_mObjSpace, tp_key, Qnil);
rb_ivar_set(rb_mObjSpace, proc_key, Qnil);
}
if (RTEST(proc)) {
if (!rb_obj_is_proc(proc)) {
rb_raise(rb_eTypeError, "trace_func needs to be Proc");
}
tpval = rb_tracepoint_new(0, event, gc_start_end_i, (void *)proc);
rb_ivar_set(rb_mObjSpace, tp_key, tpval);
rb_ivar_set(rb_mObjSpace, proc_key, proc); /* GC guard */
rb_tracepoint_enable(tpval);
}
return proc;
}
static VALUE
set_after_gc_start(VALUE rb_mObjSpace, VALUE proc)
{
return set_gc_hook(rb_mObjSpace, proc, RUBY_INTERNAL_EVENT_GC_START,
"__set_after_gc_start_tpval__", "__set_after_gc_start_proc__");
}
static VALUE
set_after_gc_end(VALUE rb_mObjSpace, VALUE proc)
{
return set_gc_hook(rb_mObjSpace, proc, RUBY_INTERNAL_EVENT_GC_END,
"__set_after_gc_end_tpval__", "__set_after_gc_end_proc__");
}
void
Init_gc_hook(VALUE rb_mObjSpace)
{
rb_define_module_function(rb_mObjSpace, "after_gc_start_hook=", set_after_gc_start, 1);
rb_define_module_function(rb_mObjSpace, "after_gc_end_hook=", set_after_gc_end, 1);
}
|
